Aspen Health is a Princeton-based practice that applies a lifestyle-medicine approach to primary care, focusing on helping patients achieve and sustain optimal health rather than simply responding to illness. Informed by functional medicine, its care emphasizes the whole person and the interconnected roles of nutrition, sleep, daily habits, and social well-being. Aspen Health prioritizes nutrition optimization and other lifestyle changes as first-line tools, with guidance centered on real whole foods, predominantly plant-based eating, balanced proportions, and micronutrient-rich choices. The practice also emphasizes relationship-centered care, offering in-person and video visits along with direct messaging access to the doctor for a more personal and responsive experience.